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POObjective-C: Problems accessing objects in other UIViewControllers
 

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    <p>So I have a Custom UITableViewCell that holds a reference to its containing view controller (the VC that has its table in it). </p> <pre><code>// MyCell.h #import &lt;UIKit/UIKit.h&gt; #import "RootViewController.h" @interface MyCell : UITableViewCell @property (nonatomic, strong) IBOutlet RootViewController *rootViewController; -(IBAction)checkBoxClicked:(UIButton*)sender; // MyCell.m @implementation MyCell @synthesize rootViewController = _rootViewController; -(IBAction)checkBoxClicked:(UIButton*)sender { [self setCheckBoxChecked:!_checkBoxChecked]; [_rootViewController refreshVisibleViewForCellTagged:self.tag]; } </code></pre> <p>In my cell I have a button that changes a variable and then calls a function in my rootViewController. The method is actually called however when I try to access any object in the RootViewController inside of the refreshVisibleViewForCellTagged method they are are '0x0' / nil;</p> <pre><code>// RootViewController.h @interface RootViewController : UIViewController &lt;UITableViewDataSource, UITableViewDelegate&gt; @property (nonatomic, strong) IBOutlet UITableView *myTableView; // RootViewController.m - (void) refreshVisibleViewForCellTagged:(NSInteger)cellTag { UITableView *tableView = self.myTableView; // nil NSIndexPath *indexPath = [self.myTableView indexPathForSelectedRow]; // nil MyCell *selectedCell = (MyCell*)[self.myTableView cellForRowAtIndexPath:indexPath]; // nil if (selectedCell.tag == cellTag) { NSLog(@"Refresh one way."); } else { NSLog(@"Do something else."); } } </code></pre> <p>Can anyone shed some light as to why I cant access any objects/variables in the RootController from within the method 'refreshVisibleViewForCellTagged'?</p> <p>Please and thank you!</p> <p>** My big question is <strong>Why</strong> can't I access any objects when calling a method in a view controller From a different view controller. There is some great programming truth that I am not aware of here, is it a permissions issue? Im not using @class (forward classing) in this instance. </p>
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    1. COShouldn't you be subclassing the `UITableViewCellDelegate` protocol and generating feedback via the delegate model?
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    2. CO@Brooks - Yes I receive cellTag without any issue.
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    3. CO@trojanfoe - What Im trying to do with this method in the root view controller is to see if the currently selected cell (which has a detail view visible because RootView is a split screen showing 50% table and 50% view with labels) so if the currently selected cell was the cell where the checkbox was clicked then refresh the label in the view to reflect the new value of the checkbox. I dont know how a Delegate method would help me do such a custom task.
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